Should You Worry? Petrol in a Diesel Car in North Poulner
Less than you probably are, provided it has not been started. Petrol sitting in a diesel tank does nothing to the motor till something draws it through the system — the ignition priming your pump, your starter, or driving on its own. So the fair answer to the first question everyone in North Poulner asks, "have I wrecked it?", is normally no. Petrol in Diesel is who to call, with your engine kept off, so it stays that way. Further down, this page sets out what petrol actually does inside a diesel, how far it might have gone, and how to stop it happening to you a second time.
Inside the motor: what petrol in a diesel does
Diesel does two jobs on its way through an engine. Before it combusts, it protects — then it ignites. The high-pressure fuel pump and your injectors are made to very fine clearances, and the diesel passing through them is what stops those surfaces from wearing down against each other.
Poorly at the first, not at all at the second: that is petrol. The rattling comes from petrol being designed not to ignite when compressed, which is exactly the reverse of what a diesel needs. On top of that it is runnier than diesel, it strips away the lubrication your system hinges on, and any pump working on that mix is wearing itself.
Together, those leave the shape of the trouble clear. Contact does not do the harm — movement does. Any tank with petrol in it is a fuel problem. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds travels on with your fuel to the fuel injectors further on.
Four scenarios our engineers see around North Poulner: how serious is petrol in a diesel?
Fuelled but not once started — as good as it gets. Being at a forecourt is what makes this the case: elsewhere, the vehicle has been driven there to begin with. With the petrol held in the tank alone, it is cleared and flushed right where it stands, and nothing more is needed.
The ignition switched on, or a short start. With your system primed, your lines and filter now contain petrol that has come from that tank. Still usually straightforward: drain, flush, and your filter seen to.
Those few miles driven were your pump labouring on fuel diluted by petrol the whole way. Tank, lines, filter, then clean fuel put through the entire system: that is this work, and the way the vehicle was driven matters as much as the mileage. Short trips, like the school run to Poulner Infant School and Nursery, are one thing. Any mileage on the M27, under 10 miles from North Poulner, means the motor has worked hard throughout, and a run to Salisbury, under 15 miles away, is a very different job too.
Driven until it protested. Clattering, a lumpy idle, smoke, a throttle that has gone soft. That's your motor telling you its fuel has stopped behaving like diesel. Pull up where you are — on the verge on Old Farm Close, at the kerb, down a side road — and don't move it. What comes first is still the fuel drain and flush, and that deals with it, with permanent damage very unusual if a vehicle is stopped quickly.
Myths North Poulner drivers hear about petrol in a diesel
"Top it up the rest of the way with diesel and it will be fine" — a myth. It won't. A bigger tank of the same mixture is all you get, since topping up takes out nothing. A diesel fuel system doesn't tolerate petrol by percentage in the way that guidance supposes.
Not so: a newer diesel copes with a bit of petrol. Rather, the opposite. Smaller parts and higher pressure are the way a current diesel runs its fuel, and that makes the protection count more, not less.
"It starts, it drives, and so there is no harm" — the myth that trips up more motorists than any other. The motorist of a petrol engine fed diesel normally has no choice but to stop, because it will not run, and the damage stops with them. Feed petrol to a diesel and it normally starts, ticks over and pulls away like nothing has happened — all while its pump wears. A running engine does not mean fine.
Myth: a two-stroke additive makes it safe to drive home. It is an old fix, supposed for another fault. The petrol is still inside the tank after that, and whatever it has weakened is not put back.
The next start draws petrol back round the pump out of your lines and your filter, where some of it ends up once your engine has been run. That is why a DIY tank drain doesn't sort it — a myth. And, a can of petrol drained by the roadside is truly risky.
How does petrol in a diesel take place?
On purpose? Never. Through carelessness? Rarely, if ever. A diesel nozzle generally won't fit a petrol vehicle, yet the smaller petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one mistake simple, and only in that direction.
Routine and the vehicle getting out of step is how it occurs. A new car, a hire car or a courtesy car. A household with one petrol and one diesel on the drive. Your usual forecourt, its pumps suddenly in a different order. A train to catch, and a rushed fill en route to Hinton Admiral. The first fill-up in a diesel Peugeot 308 after years of driving petrol is precisely the moment it takes place. The hand does what it has always done once you add rain, a phone call or a back seat full of kids.
How to prevent petrol in a diesel at your next fill-up in North Poulner
- The label is what counts, and so check the petrol pump instead of the colour: in the UK unleaded handles are usually green and diesel black, but not on every forecourt.
- In a vehicle you do not know, look inside the flap over the filler or at the cap before your first fill: many motors print the fuel type there.
- Label your key. In a household with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of intending to remember.
- Before the nozzle leaves the pump the first time you fuel a hired or new motor, say "diesel" aloud. Daft, yes, but it does the trick.
- While you're thinking about something else, this is an easy mistake to make — so tuck your phone away.
- Some diesels have a filler built to refuse a petrol nozzle, and devices you can add exist for cars without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the pump.
- Stop as soon as you realise. Less petrol in the tank makes a weaker blend. It does not change what to do next, which is still not to fire it up.
Put petrol in a diesel around North Poulner already?
Short and simple, then, is the order of things. Do not turn the ignition on, and do not start it. Ask the attendants to help you push it away from the pump if you are still at the forecourt, whether that is Esso or anywhere else. Next, 0333 366 0103. We'll ask what got in, roughly how much, and if it has been run.
If it was AdBlue instead of petrol, say so. That is a separate fault — corrosion and deposits instead of lost protection — and it has its own page for North Poulner.
North Poulner petrol in a diesel tasks: why one costs more than another
The four situations above are four different jobs, so no single quote for this would be fair. What moves your cost is chiefly which of them you are in. The ratio counts next, meaning how much of your tank is petrol, and then the location of the vehicle and whether getting to it is safe for our van.
Three questions come first, before any quote, instead of after — what was put in, how much, has it run — and this is the reason. Those answers are what change a range into one firm number.
About North Poulner itself
North Poulner is a suburban area situated on the riverside in Hampshire, with an elevation of around 27 metres. North Poulner lies near the villages of Poulner and Hangersley, and is close to Blashford, in a region of southern England known for its gentle landscape. North Poulner has a population of approximately 2187 people, predominantly living in semi-detached housing. North Poulner is located near the city of Salisbury, which is about 14.7 miles away.
Fuel drain cover in North Poulner and across Hampshire
Poulner, Hangersley and Blashford are among the places near North Poulner that the same vans work, answering petrol in diesel call-outs across North Poulner's BH postcode area. Our technicians drain where the car is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
In North Poulner and still at the petrol pump?
In that case, you could not be in a better spot. Keep it off. Call.